AVT MAGIC TH2, Hardware Manual

Page: 58 / 130

PAGE 58
W i n d o w s P C S o f t w a r e
–
Drop
: If you activate this function, a connection on the selected line
(
Line 1
or
Line 2
) can be dropped.
–
Load Preset
: Via this function it is possible to load a preset which you
have to select under
Preset
.
–
Set Audio Line
: This option allows a switching on a certain Audio line
(
PRETALK
,
HOLD
or
ON AIR
), which you must set under
Audio Line
.
In the ISDN operating mode you must additionally select the desired
Line
.
–
Connect via DTMF/Accept Call In
: The system supports the connec-
tion via DTMF tones (Option, see CHAPTER 8), which are fed in via the
inputs
AUDIO 1 IN/AUDIO2 IN
. The call initiation is realised by this
function so that the systems knows when the phone number is com-
plete. Under
Line
you set the line (
Line 1
or
Line 2
) on which the con-
nection is established (only in ISDN operating mode). Under
Audio
Line
you select the Audio line (
PRETALK
,
HOLD
or
ON AIR
) which is
activated when the partner accepts the call.
If the system receives a call, it can be accepted on the selected line via
this function. The Audio interface is activated according to the config-
uration.
–
Connect Level Triggered
: After selection this funtion the call initia-
tion is realised by a static level (+5V = configuration under
Positive
Edge
or 0V = configuration under
Negative Edge
) instead of a edge
triggered level (see above).
Example 1:
You want to accept a call on line 1 with TTL 1. The caller is to be
switched directly in the ON AIR mode. After the conversation has been
finished the connection is to be cleared with TTL 1.
Programming:
Positive egde:
Function Code: Call Out/Accept Call In
Audio Line: ON AIR
Line: Line 1
Phone Number: -
Negative egde:
Function Code: Drop
Line: Line 1
FIG. 24 SEQUENCE OF EVENTS FOR THE EXAMPLE 1
1
5
6
9
9-pol. SUB-D connector
to MAGIC TH2
(TTL/RELAY)
Switch is opened:
Pin 2 = TTL 1 is on +5 V (via internal 10 KOhm series resistance)
Switch is closed:
Pin 2 =TTL 1 is set to 0V (Pin 5):
Existing connection is dropped
Switch is opened:
Pin 2 =TTL 1 is set to +5V:
Incoming call is accepted.
Switch